Sinaga, H., Simamora, R.M. and Sari, A.S.P. 2020. IMPROVING STUDENTS’ VOCABULARY MASTERY THROUGH WORD WALLS STRATEGY TO THE EIGHTH GRADE STUDENTS OF SMP SWASTA KARYA BHAKTI MEDAN. Kairos English Language Teaching Journal. 2, 1 (Jun. 2020), 17–27. DOI:https://doi.org/10.54367/kairos.v2i1.722.